Frame sill extrusion



FIG. 1 is a perspective view of the frame sill extrusion showing my new design;

FIG. 2 is a right side elevation thereof;

FIG. 3 is a front elevation thereof;

FIG. 4 is a left side elevation thereof;

FIG. 5 is a rear elevation view thereof;

FIG. 6 is a top plan view thereof; and

FIG. 7 is a bottom plan view thereof. 

The ornamental design for a frame sill extrusion, as shown and described. 